CN103155032B - For removing microphone apparatus and the method for non-required sound - Google Patents

For removing microphone apparatus and the method for non-required sound Download PDF

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Publication number
CN103155032B
CN103155032B CN201080069488.3A CN201080069488A CN103155032B CN 103155032 B CN103155032 B CN 103155032B CN 201080069488 A CN201080069488 A CN 201080069488A CN 103155032 B CN103155032 B CN 103155032B
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China
Prior art keywords
signal
vibration
film
transducer
sound
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Active
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CN201080069488.3A
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Chinese (zh)
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CN103155032A (en
Inventor
M·V·A·叙旺托
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Nokia Technologies Oy
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Nokia Technologies Oy
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Priority to PCT/IB2010/053862 priority Critical patent/WO2012025794A1/en
Publication of CN103155032A publication Critical patent/CN103155032A/en
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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00Circuits for transducers, loudspeakers or microphones
    • H04R3/005Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10Applications
    • G10K2210/129Vibration, e.g. instead of, or in addition to, acoustic noise
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208Noise filtering
    • G10L21/0216Noise filtering characterised by the method used for estimating noise
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/003Mems transducers or their use
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00Microphones
    • H04R2410/05Noise reduction with a separate noise microphone

Abstract

A kind of device includes: the first transducer, is arranged to detect sound and generate the first signal based on the sound detected.This device also includes: the second transducer, is arranged to detection vibration and/or sound and generates secondary signal based on the vibration detected and/or sound.Second transducer than the first transducer the most insensitive.This device includes: interface, is arranged to send the first signal and secondary signal to processor, and this processor is configured for secondary signal and revises the first signal.

Description

For removing microphone apparatus and the method for non-required sound
Technical field
The application relates to a kind of method and apparatus.In certain embodiments, the method and device Relate to the microphone assembly of electronic equipment.
Background technology
Some electronic equipments include the microphone assembly for capturing audio frequency.The wheat of electronic equipment Gram wind part is generally integrated with electronic equipment and is positioned at electronic equipment to capture from electricity The audio frequency of the surrounding of subset.
The microphone assembly of electronic equipment can include following film, and this film enters in response on film The sound penetrated and move.The movement of detection membrane, and the circuit of microphone assembly can generate sound Frequently signal.
When capturing audio frequency from the environment of electronic equipment, the film of microphone assembly can suffer from Other vibration of electronic equipment.Such as, mechanical vibration caused by the structure of electronic equipment can cause The movement of film.The movement that film produces due to mechanical vibration can be converted into audio signal.This Mean by mechanical vibration (other parts in the manipulation of such as electronic equipment, electronic equipment Mobile or other outside mechanical vibration of electronic equipment) noise that is expressed as in audio signal. Therefore the noise produced not due to sound in audio signal can make audio frequency believe significantly Number deteriorate, this is likely to result in bad Consumer's Experience.
Shock material (the such as rubber blanket that known use is next to around microphone assembly Sheet) by the mechanical vibration isolation of mike with electronic equipment.But, some electronic equipment sizes The amount of space that can be used for assembling shock material in little and electronic equipment is limited.This meaning By the small-sized and lightweight microphone assembly in mechanical vibration and miniaturized electronics effectively every From being likely difficult to realization.
Another known mechanical is arranged on floating backboard installation microphone assembly.Backboard is designed For vibrating together with microphone assembly when electronic equipment experience mechanical vibration.But, backboard The frequency response of backboard and the frequency of film may be caused with the different quality of the film of microphone assembly The mismatch of response.Frequency response mismatch may cause bad noise removing performance.Additionally, Mike Wind part performance during electronic equipment is not subjected to the environment of mechanical vibration wherein is likely to be due to Floating backboard and degenerate.
A kind of alternative known arrangement uses acceleration transducer to detect the movement of electronic equipment. Detect the acceleration of electronic equipment and by this acceleration and the audio frequency generated by microphone assembly Signal Matching is to determine which " noise " in audio signal is owing to mechanical vibration.Then, Digital Signal Processing is applied to remove and being subjected to mechanical vibration at electronic equipment to audio signal The audio signal of Shi Shengcheng.But, acceleration transducer may have at various mechanical oscillation frequencies Having the different vibration sensitivities from microphone membrane parts, this may cause bad noise elimination property Energy.Include that the microphone assembly of both film and accelerometer may the possible height of needs it addition, produce The non-optimal manufacture solution of cost.
Noise can be used to disappear in the case of needing the clear communication in noise surrounding Except mike.Noise cancelling microphone design can be that passive noise eliminates mike or active Noise cancelling microphone.
Active noise eliminates mike can include two indivedual microphone elements and for electronics The component of two signals from two microphone elements is distinguished on ground.Arrange two mikes Element is so that the first microphone element receives required speech input and existence near speech Background noise, and second microphone element the most only senses background noise.Therefore, active The component of noise cancelling microphone can deduct the second Mike from the first microphone signal The voice signal of noise decrease is generated during wind.
Active noise eliminates microphone system and built-in calibration function can be used with based on from wheat Relative signal level two mikes of calibration of gram wind.Operation in noise cancelling microphone system Period monitors the output valve of mike.Active noise elimination algorithm determines any of two mikes Signal level difference is owing to acoustic pressure wave level differences.But, draw if there is being changed by temperature Change and the calibration function of the mike output risen do not compensate, then noise cancelling alorithm will Will not show the best.Differently change it is true that any relative to the value of calibration The condition of the sensitivity of two mikes all will make the penalty of whole system.Mike it Between relatively rapid temperature contrast can cause mike sensitivity difference relative to each other.This Can be such as by the power amplification that another mike is heated to such as 50 degrees Celsius in equipment Device causes.If mike differs, then environment temperature will be changed and make differential responses by they, And it is more more than in another mike that this makes the sensitivity in a mike change.
Figure 4 illustrates a kind of alternative known arrangement.This layout relates to by multiple first films The Direct Digital mike of 420 structures, the micro Process that each first film is supported by substrate 470 Grid protocol.Second film 410 and multiple first film 420 are positioned at two diverse locations.By multiple The Direct Digital mike that first film 420 is constituted is made up of indivedual first films 460.Second film 410 Supported by substrate 470 and be positioned above multiple first film 420 with at multiple first films 420 And form chamber 430 between the second film 410.Pressure transducer 440 is in response to the pressure in chamber 430 Power.Drive electronics 450 is in response to pressure transducer 440 and controls multiple first film 420 Position.Poll electronic installation 450 is in response to the position of multiple first films 420 and produces number Word output signal.
Figure 5 illustrates another known arrangement.This layout includes at least two film, Qi Zhongyi Individual film as compare with another film gone quick.Do not stack any one film in these films, and should Arrange and allow at high SPL level record audio frequency without saturated.Existing goes the higher background of quick film to make an uproar Sound and less SNR.
The layout of Fig. 5 allow mobile device have noise conditions (such as due to wind, traffic, Crowd etc. and produce have noise conditions) operation of period.Can be in mike cabin High pass electrical filter is implemented so that permission is having between (microphone capsule) and ASIC Operation under the conditions of wind.But, this is non-ideal solution at least three reason: 1) wind noise has made microphone output signal saturated, 2) the preferred sound in no-wind environment Frequently quality requirement needs to arrange high pass filter at following point, and this point will be by the wind of vast scale Noise, and 3) this strategy is impossible for digital microphone.Carry out Attempt using DSP circuit to have wind number from many arrays removing of mike, but they have Limited effect.Each film has different sensitivity and each film exports independent signal.? In this example, the signal of the film being only from less sensitivity has acceptable level of distortion, This signal is only selected to process for further, and ignore/dump may be super in high-amplitude sound field Cross film and ADC full scale output time due to signal limiter exceedingly distortion another letter Number.In addition it is also possible to exist on one or two signal paths can be based on wind noise Level and the high pass filter that is selectively activated.Can lose making the most again signal The wave filter on the signal path continued is activated to reduce wind noise further in the case of Zhen.
The purpose of embodiments herein is one that solves in the problems referred to above or some asks Topic.
Summary of the invention
In an embodiment of the application, it is provided that a kind of device, this device includes: first Transducer, is arranged to detect sound and generate the first signal based on the sound detected; And second transducer, it is arranged to detection vibration and/or sound and based on shaking of detecting Dynamic and/or sound generates secondary signal, the second transducer than the first transducer the most unwise Sense;And interface, it is arranged to send the first signal and secondary signal to processor, processes Device is configured for secondary signal and revises the first signal.
Preferably, the first transducer and the second transducer are same type.
Preferably, this device includes that being configured for secondary signal revises the first signal Modified module.It is highly preferred that modified module is arranged to deduct secondary signal from the first signal.
Preferably, the second transducer be arranged to detect included in the following or The non-required vibration that person is multinomial: the vibration of device, the wind noise of device and manipulation and non-required Sound.
Preferably, the first transducer and the second transducer are adjacent one another are.First transducer and Two transducers may be located in same substrate.Substrate can be chip of micro-electro-mechanical system.
Preferably, the second transducer and device are substantially being acoustically isolated.It is highly preferred that Second transducer is being acoustically isolated with device.Even further preferably, lid is positioned at the second transducer On and the second transducer is substantially being acoustically isolated with device.Preferably, lid adheres to To the second transducer.Preferably, vacuum or partial vacuum are located therein the film of the second transducer In the space of movement.
Preferably, this device includes first connecing for send the first signal on the first channel Mouthful and for sending the second interface of secondary signal on a second channel.
Preferably, modified module includes being arranged to being directed at the first signal and secondary signal The alignment modules of phase place.Additionally or alternatively, modified module can include being arranged to It is directed at the alignment modules of the amplitude of the first signal and secondary signal.
Preferably, the frequency response of the first transducer and the frequency response of the second transducer are basic Upper identical.Acoustical signal can be gone quick by the second transducer.Alternatively, the second transducer is permissible In response to one or more frequency range different from the first transducer.Preferably, second change Can be tuned to and one or more frequency of non-required vibration (vibration of such as device) by device One or more frequency range that scope is corresponding.Preferably, the first transducer be tuned to One or more frequency range that one or more audio frequency range is corresponding.
Preferably, the first transducer and/or the second transducer include microphone membrane.
Preferably, the first signal is from least one audio-source, and secondary signal is from removing At least one other source outside this audio-source.Preferably, at least one other source is machinery Vibration source.
In another embodiment, it is provided that a kind of device, this device includes: be used for detecting sound Device;For generating the device of the first signal based on the sound detected;For detecting vibration And/or the device of sound, for detecting the device ratio of vibration and/or sound for detecting sound Device is the most insensitive;For generating the second letter based on the vibration detected and/or sound Number device;And for sending the device of the first signal and secondary signal to processor, process Device is configured for secondary signal and revises the first signal.
In another embodiment, it is provided that a kind of device, this device includes: at least one processes Device;And include at least one memorizer of computer program code, at least one memorizer and Computer program code is arranged to together with at least one processor make device at least: with One transducer detects sound and generates the first signal based on the sound detected;And with second Transducer detects vibration and/or sound and generates second based on the vibration detected and/or sound Signal, the second transducer than the first transducer the most insensitive;And send out to processor Sending the first signal and secondary signal, processor is configured for secondary signal amendment the first letter Number.
In another embodiment, it is provided that a kind of device, this device includes: the first transducer, It is arranged to detect sound and generate the first signal based on the sound detected;And second Transducer, be arranged to detection vibration and/or sound and based on the vibration detected and/or Sound generate secondary signal, the second transducer than the first transducer the most insensitive;With And processor, it is configured for secondary signal and revises the first signal.
In another embodiment, it is provided that a kind of device, this device includes: be used for detecting sound Device;For generating the device of the first signal based on the sound detected;For detecting vibration And/or the device of sound, for detecting the device ratio of vibration and/or sound for detecting sound Device is the most insensitive;For generating the second letter based on the vibration detected and/or sound Number device;And for revising the device of the first signal based on secondary signal.
In another embodiment, it is provided that a kind of device, this device includes: at least one processes Device;And include at least one memorizer of computer program code, at least one memorizer and Computer program code is arranged to together with at least one processor make device at least: with One transducer detects sound and generates the first signal based on the sound detected;And with second Transducer detects vibration and/or sound and generates second based on the vibration detected and/or sound Signal, the second transducer than the first transducer the most insensitive;And based on the second letter Number amendment the first signal.
In another embodiment, it is provided that a kind of method, the method includes: use the first transducer Detection sound;The first signal is generated based on the sound detected;With the second transducer detection vibration And/or sound, the second transducer than the first transducer the most insensitive;Based on detecting Vibration and/or sound generate secondary signal;And send the first signal and the second letter to processor Number, processor is configured for secondary signal and revises the first signal.
In another embodiment, it is provided that a kind of method, the method includes: use the first transducer Detection sound;The first signal is generated based on the sound detected;With the second transducer detection vibration And/or sound, the second transducer than the first transducer the most insensitive;Based on detecting Vibration and/or sound generate secondary signal;And revise the first signal based on secondary signal.
In another embodiment, it is provided that a kind of method manufacturing device, the method includes: will First transducer and the second transducer are positioned on substrate, and the first transducer is used for detecting sound also And generating the first signal based on the sound detected, the second transducer is used for detecting vibration and/or sound Sound and generate secondary signal, the second transducer ratio first based on the vibration detected and/or sound Transducer is the most insensitive;And be connected to connect by the first transducer and the second transducer Mouthful, interface is for sending the first signal to the device being used for revising the first signal based on secondary signal And secondary signal.
In another embodiment, it is provided that a kind of computer program, this computer program includes fitting Code device in the step performing method when program is run on a processor.
Accompanying drawing explanation
In order to be more fully understood that the application and about how the application can be implemented, now will By example referring to the drawings, wherein:
Fig. 1 illustrates the schematic diagram of some embodiments;
Fig. 2 illustrates the schematic diagram of other embodiments;
Fig. 3 illustrates the flow chart of some embodiments;
Fig. 4 illustrates the layout of the first mike;
Fig. 5 illustrates the layout of second microphone;
Fig. 6 illustrates the schematic diagram according to some other embodiments.
Detailed description of the invention
The machinery being described below for reducing the next free electronic equipment experience in audio signal shakes The apparatus and method of dynamic noise.
In this regard, with reference to Fig. 1, the figure disclose example electronic device 100 or The schematic block diagram of person's device.Electronic equipment 100 is arranged to reduce according to some embodiments The mechanical vibration of capture in audio signal.
Electronic equipment 100 is in certain embodiments for operating in a wireless communication system Mobile terminal, mobile phone or subscriber equipment.In other embodiments, electronic equipment is several Word camera, Video Camera, portable dictation device, PDA(Personal Digital Assistant), above-knee Type computer or be suitable for capture sound other electronic equipment any.
Electronic equipment 100 includes the audio-frequency module 102 being linked to processor 104.Processor 104 are linked to transceiver (TX/RX) 106, user interface (UI) 108 and memorizer 110.
Processor 104 can be arranged to perform various program generation in certain embodiments Code.Such as, the program code of enforcement can include for controlling audio-frequency transducer 116 with capture The code of sound.Implement program code include in certain embodiments audio digital processing or Configuration code.The program code implemented the most also includes for processing sound further Frequently the extracode of signal.The program code implemented can the most such as be stored in In memorizer 110 and specifically it is stored in the program code sections 112 of memorizer 110 All fetched by processor 104 for when no matter when needing.Memorizer 110 is implemented at some Example can be provided for store data (data such as, processed) according to the application Part 114.
Audio-frequency module 102 includes the sound of the audio frequency in the environment for capturing electronic equipment 100 Frequently transducer 116.Audio-frequency module 102 can be special IC in certain embodiments. In certain embodiments, audio-frequency module 102 is integrated with electronic equipment 100.In other embodiments In, audio-frequency module 102 separates with electronic equipment 100.This means that processor 104 is at some Can be from including that the external equipment of audio-frequency module 102 receives the signal of amendment in embodiment.
Audio-frequency transducer 116 can include in certain embodiments dynamically or moving coil, Film or diaphragm, electric transducer part, electrostatic transducer or transducer array, MEMS (MEMS) mike, electric capacitor microphone (ECM) or be used for capturing sound Other appropriate device any or microphone assembly.Additionally or alternatively, transducer bag Include multifunctional equipment (MFD).In some preferred embodiments, audio-frequency transducer 116 is bag Include the MEMS microphone of microphone membrane.
In certain embodiments, MEMS microphone is used.MEMS microphone provides and relatively stays Some advantages for electret condenser microphone (ECM), as non-limiting example, this A little advantages include the excellent of manufacturability, volume of production scalability and the stability in variable environment Point.The MEMS microphone package that design acoustically optimizes is probably challenging, because of Require to depend primarily on for encapsulation design and wherein will use the machinery of the equipment of MEMS microphone Interface.Such as, the most how design requirement may rely on and integrated MEMS wherein Mike.
In certain embodiments, MEMS microphone includes two chips: MEMS chip and Special IC (ASIC) chip.MEMS chip and asic chip are installed on base Link together on plate PWB and with at least one bonding wire.Have for receiving sound The shell of one or more sound port of pressure ripple is incorporated to mike.MEMS chip is included in The condenser microphone element of etching in silicon.Asic chip includes prime amplifier, analog digital conversion Device and could be included for the electric charge pump of biased mem S microphone element.Real at some Execute in example, include MEMS chip element at ASIC.ASIC detection capacitance variations, general They are converted into the signal of telecommunication and pass them to (can be outside at mike) suitably Processing means (such as baseband processor or amplifier).
In certain embodiments, this device can include ECM.In certain embodiments, ECM Including vibrating diaphragm, it is positioned to be relatively fixed backboard and electricity via air layer and vibrating diaphragm Road, such as the static capacity between vibrating diaphragm and stationary backplate is converted into the signal of telecommunication ASIC.In the shell of one or more sound port having for receiving acoustic pressure wave also Enter mike.ASIC and shell are installed on substrate (such as printed substrate (PWB)). Backboard is connected to PWB and is connected thus to ASIC by spring.Asic chip can include Prime amplifier and/or analog-digital converter.ECM also has for drawing signal of telecommunication (not shown) External connection device.In certain embodiments, ECM can include one or more MEMS microphone (such as MEMS microphone package or module), although some ECM MEMS microphone may not be included.
One important parameter of mike is sensitivity.It is pin by the sensitivity definition of mike Specific sound is stimulated and the output voltage of loading condiction.Can express in units of dBV/pa It.In the case of digital interface, it is also possible to relative to the full mark expressed in units of dBFS Degree signal provides sensitivity.
In certain embodiments, processor 104 is linked by analog-digital converter (ADC) 118 To audio-frequency transducer 116.Analog-digital converter (ADC) 118 can be any suitable conversion Device.In certain embodiments, processor 104 is also linked to sound via transducer processor 120 Frequently transducer 116.Transducer processor 120 is arranged to amendment via ADC118 from sound Frequently the audio signal that transducer 116 receives.In certain embodiments, audio-frequency transducer 116 can And generate to analog-digital converter from the sound of the environment of electronic equipment 100 with detection (ADC) 118 signal sent.Transducer processor 120 can be arranged to perform use Calculate from the signal processing of audio-frequency transducer 116 and the signal of vibration transducer 122 in amendment Method.Analog-digital converter (ADC) 118 sends digitized audio frequency to transducer processor 120 Signal is for amendment audio signal.In certain embodiments, transducer processor 120 is can Choosing or optional, because without revising it before combining audio or vibration signal ?.Alternatively, in some other embodiments, transducer processor 120 is optional, Because processor 104 performs the process of transducer processor 120, such as revise audio signal. In certain embodiments, there is the integrated Mike of the mike including having integrated analog digit converter Wind, and this integrated microphone output digital audio signal.
Audio-frequency transducer 116 can suffer from mechanical vibration (such as user in some circumstances To the physical manipulation of electronic equipment 100, the mechanical vibration that generate " click " sound and association Key press) or by the internal part of electronic equipment (such as camera actuator or hard-drive Movable part) cause other vibration.Audio-frequency transducer 116 is the most all right Detection in industrial environment generate vibration, the vibration such as caused by heavy-duty machine or other Vibration.Electronic equipment 100 may also go through the vibration from home environment in certain embodiments, The vibration such as generated from washing machine household electrical appliance similar with other.Such as, this equipment can be by Placing on flat surfaces, wherein this surface carries out videoconference/video call or record people The vibration produced due to household electrical appliance is received while sound.
Mechanical vibration in audio-frequency transducer 116 incidence can activate audio-frequency transducer 116 also And make audio-frequency transducer 116 generate audio signal due to mechanical vibration.In this way, exist The output of audio-frequency transducer 116 represents the mechanical vibration in audio signal.
Audio-frequency module 102 the most also includes for capturing electronic equipment 100 warp The vibration transducer 122 of the mechanical vibration gone through.In certain embodiments, vibration transducer 122 The non-required vibration that detection is incident at equipment.Non-required vibration can include the machinery of this device Vibration.Alternatively or additionally, non-required vibration can include wind noise, sound, due to The vibration handled and produce and other vibration of this device.Such as, vibration transducer 122 detects The handling or in previously mentioned vibration source due to user that electronic equipment 100 is subjected to The mechanical vibration that any vibration source produces.In certain embodiments, vibration transducer 122 includes Dynamically or movable coil, electric transducer part, electrostatic transducer or include MEMS (MEMS) transducer array or fit for capturing any other of the vibration of electronic equipment When device or microphone assembly.In some preferred embodiments, vibration transducer 122 is bag Include the MEMS component of microphone membrane.
Similar to audio-frequency transducer 116, vibration transducer 122 is via analog-digital converter 124 It is connected to transducer processor 120.Analog-digital converter 124 is similar to analog-digital converter 118.
In certain embodiments, it is being acoustically isolated vibration transducer 122 to stop from electricity The sound of the environment of subset 100 enters.In certain embodiments, vibration transducer 122 is examined Survey mechanical vibration and transmitted by air substantially free of sound.Vibration transducer 122 is at some Embodiment is included on film for the week by vibration transducer 122 with electronic equipment 100 Enclose the lid (not shown) being environmentally isolated.The lid of vibration transducer 122 means vibration transducer The film of 122 does not moves in response to from the sound outside electronic equipment 100.Lid can be one A little embodiments are adhered to the microphone membrane of vibration transducer 122 or can implement at some It example is the intact part created during manufacture of vibration transducer 122.
In certain embodiments, audio-frequency transducer 116 and vibration transducer 122 are that include can The MEMS (MEMS) of moving film.Vibration transducer 122 and audio-frequency transducer 116 Film move in response to air and/or the vibration of the main body of electronic equipment, and correspondingly, change Energy device 122, transducer 116 generate signal.
Describe with electronic equipment as shown in Figure 1 detection and amendment sound now with reference to Fig. 3 Frequently the implementation of signal.Fig. 3 discloses the flow chart illustrating some embodiments.
When generating sound in the immediately environment of electronic equipment 100, sound can be via suitable Audio-frequency transducer 116 in opening enters electronic equipment 100.As shown in step 302, Sound is detected at audio-frequency transducer 116.Then export to analog-digital converter 118 and change from audio frequency The signal of energy device 116, this analog-digital converter 118 generates numeral sound as shown within step 306 Frequently signal.
In certain embodiments, analog-digital converter 118 may be located in following ASIC or Positioning together with following ASIC, this ASIC can be positioned in microphone module.At some In other embodiments, analog-digital converter 118 may be located at outside microphone module.Such as, modulus Transducer 118 is the element the most suitably changing microphone signal of uplink and has suitable Microphone module when design.
Now with reference to Fig. 6, some embodiments are described.Fig. 6 illustrates the two of some embodiments Plant and schematically illustrate.Especially, Fig. 6 illustrates alternative, wherein audio-frequency module 102 Including MEMS microphone, this MEMS microphone includes audio frequency film 116 and vibrating diaphragm 122. Microphone assembly includes that ASIC610, ASIC610 include being arranged to perform digital signal The processor processed.ASIC610 perform as about previously discussed embodiment discussed to sound Frequently the signal revising and sending to electronic equipment 100 amendment of signal.
In another embodiment, in addition to ASIC610 does not includes digital signal processing capability There is provided and the most identical layout.ASIC instead include analog-digital converter and Audio signal and vibration signal is sent for amendment to electronic equipment 100.
The digital microphone of some embodiments can provide as PDM(pulse density modulated) Output signal.(low-pass filtering) PDM signal is digitally selected to obtain institute in ASIC Need audio band.Highly can optimize for the 4th rank sigma-delta (sigma delta) manipulator Decimation filter.Any ADC topology of the PDM frequency spectrum generating similar kind can be used. Digital microphone substantially has integrated amplifier in parts and sigma-delta type ADC turns The common microphone of parallel operation.In certain embodiments, exist and can receive the single of summing signal ADC。
The audio signal exported from audio-frequency transducer 116 via ADC118 includes audio signal In following feature, these features are not owing to sound wave but are attributed to the machine of electronic equipment 100 Tool vibrates.
Vibration transducer 122 detects electronic equipment 100 or dress as shown in step 304 The mechanical vibration put.The environment of vibration transducer 122 and electronic equipment 100 acoustically by every From and the mechanical vibration of only capture device 100.Vibration transducer 122 is to digital to analog converter 124 Output analogue signal, this digital to analog converter generates non-required vibration as shown in step 308 Digital vibration signal.The digital vibration signal of non-required vibration can include with from except with sound The signal that the vibration in the source outside the audio-source of the connection of signal correction frequently and/or sound are associated.Example As, can record both 116 and 122 and vibrate and/or acoustical signal, but audio-frequency transducer 116 Can be more sensitive to sound, and vibration transducer 122 can be acoustically isolated, so that The sensitivity of vibration transducer 122 signal (such as mechanical vibration and/or possible strong/make an uproar greatly Sound) a certain scope in.
Transducer processor 120 receives audio signal and believes for revising the vibration of audio signal Number.Transducer processor 120 could be for revising appointing of audio signal in certain embodiments What appropriate device.Send audio signal via interface (not shown) to transducer processor and shake Dynamic signal.In certain embodiments, interface can be suitable for sending sound to transducer processor Frequently signal and any device of vibration signal.
In certain embodiments, transducer processor can receive from vibration transducer 122 Vibration signal perform signal processing.In certain embodiments, vibration signal can be by transducer Processor 120 amplifies the mechanical vibration feature in audio signal to be mated with vibration signal. This means can to deduct vibration signal from audio signal thus remove due to electricity from audio signal The mechanical vibration of subset 100 and all audio frequency characteristics of producing.In certain embodiments, may be used To complete such process (vibration eliminates) in time domain or frequency domain or the two.
In other embodiments, vibration signal can by transducer processor decay for Join vibration signal and audio signal.In some other embodiments, transducer processor 120 can With additionally or alternatively relative to delayed audio signal vibration signal so that in the time domain Audio signal and vibration signal.
Transducer processor 120 revised audio signal and vibration signal sequential and/ Or after amplitude, transducer processor 120 deducts from audio signal as shown in the step 310 Vibration signal.In this way, transducer processor eliminates and is receiving from audio-frequency transducer 116 Audio signal present in mechanical vibration feature.In certain embodiments, transducer processor 120 can be without amendment.Transducer processor 120 can instead perform operation and (such as filter Ripple and/or mathematical operation) so as to eliminate undesired signal and unmodified from audio-frequency transducer 116 Any signal with vibration transducer 122.
Transducer processor 120 then as shown in step 312 according to audio signal and shaking The combination of dynamic signal generates the audio signal of amendment and to the sound of processor 104 output modifications Frequently signal.Processor 104 can store amendment the most in the memory 110 Audio signal or the audio signal can revised to the transmission of another equipment.
In certain embodiments, the switch for vibration transducer 122 or use can be there is Activation mechanism in vibration transducer 122.Switching if only activated, the amendment of audio signal is Can occur.In order to improve disposal ability or reduce complexity or improve battery life, it is If system only and must can just use vibration transducer when required.Such as, user can also May activate, or alternatively, activation can be completed intelligibly by system.
Referring now to Fig. 2, some other embodiments are described.Fig. 2 illustrates and includes electronic equipment 100 and the schematic diagram of some embodiments of audio-frequency module 102, wherein audio-frequency module and electronics set Back-up from.
Electronic equipment is to as similar in the electronic equipment described in reference Fig. 1.Use at Fig. 1 The feature that the feature with Fig. 1 of Fig. 2 is identical is numbered by the identical numbering of middle use.
Audio-frequency module 102 can be in certain embodiments away from electronic equipment 100.Such as, In certain embodiments, audio frequency mould can be included by the microphone element in head phone Block 102.
Audio-frequency module 102 includes that amplification from the audio signal of audio-frequency transducer 116 and/or comes The amplifier of the vibration signal of self-excited oscillation transducer 122.
In certain embodiments, exist for receiving signal from audio-frequency module 102 and processing This signal and the optional dedicated transducer processor of the signal to processor 104 transmission amendment (not shown).In some other embodiments, processor 104 can be in certain embodiments By including that the data wire of two channels receives signal from amplifier 202.In certain embodiments, Amplification can include signal processing.In certain embodiments, amplification can be comprised in ASIC. In certain embodiments, no matter when it is necessary, transmits signal to amplifier 202.Such as, Audio-frequency module may determine that the signal from transducer is permissible without amplification and audio-frequency module 102 Signal is transmitted to electronic equipment 100.Processor 104 can also be in certain embodiments by the One channel receives audio signal and receives vibration signal by second channel.Processor 104 can Similar as the most in the steps 310 and 312 with the embodiment that is arranged to discussed about Fig. 1 Shown in eliminate vibration signal from audio signal and generate the audio signal of amendment.With this side Formula, this device does not includes special IC, but instead the processor of electronic equipment performs The signal processing of audio signal.
The embodiment discussed about Fig. 2 can use existing digital microphone interface.Such as, Existing microphone assembly can include in certain embodiments for capture stereo audio two Individual transducer.In certain embodiments, the microphone interface for stereo audio capture is permissible For sending audio signal and vibration signal on the channel separated.In certain embodiments, logical Cross left channel send audio signal and send vibration signal (or contrary) by right channel. This can reduce the quantity of the desired signal line between microphone assembly and electronic equipment 100.
In certain embodiments, identical microphone assembly manufactures audio-frequency transducer 116 He Vibration transducer 122.In some alternatives, can be at single MEMS (MEMS) audio-frequency transducer 116 and vibration transducer 122 are manufactured on chip.Audio frequency transducing Device 116 and vibration transducer are positioned at side each other in such embodiments, so that vibration Transducer 122 detects that the machinery identical with the mechanical vibration of audio-frequency transducer 116 experience shakes Dynamic.
In certain embodiments, identical process is used to manufacture audio-frequency transducer 116 and vibration Transducer 122.In some more embodiments, audio-frequency transducer 116 and vibration transducer 122 Transducer for same type.
In certain embodiments, audio-frequency transducer 116 and vibration transducer 122 are positioned at one On MEMS (MEMS) chip.Audio-frequency transducer 116 and vibration transducer 122 can To include two identical microphone membrane in certain embodiments.In this way, can be directed at and shake Dynamic transducer 122 and the sensitivity of audio-frequency transducer 116.Vibration transducer 122 includes permissible Assembling on chip of micro-electro-mechanical system after creating two microphone membrane on chip Lid or lid.In this way, signal chip of micro-electro-mechanical system can be in certain embodiments Including two microphone membrane for detecting vibration, but one of film includes changing for sealing vibration Can device 122 film and by the environment of vibration transducer 122 and electronic equipment 100 acoustically The lid of isolation.
In certain embodiments, the hardness of the film of the vibration transducer 122 of sealing can be due to Isolate the lid of vibration transducer 122 and be more than the hardness of the film of audio-frequency transducer.Can pass through Vacuum or partial vacuum adjust audio frequency and change being acoustically isolated vibration transducer 122 with covering The hardness of energy device 116 and vibration transducer 122 is with substantially mutually equal.Additionally, lid with There is vacuum between the film of vibration transducer or partial vacuum means to transmit in atmosphere Sound the most substantially activates the film of vibration transducer 122.In certain embodiments, audio frequency transducing First film of device 116 is designed to sensitive, this and the film used in regular microphones module Similar.Second film of vibration transducer 122 can as compare with the first film gone quick.It addition, The substantial seal around the second film can be there is to eliminate the film for acoustical signal.
Advantageously, manufacture that to include having similar Design almost identical with the two of manufacture process MEMS (MEMS) chip of film can reduce audio-frequency transducer in certain embodiments Phase contrast between 116 and vibration transducer 122.
In certain embodiments, transducer processor 120 can detect audio signal and shake Phase shift between dynamic signal.If transducer processor 120 determines audio signal and vibration signal Out-phase, then transducer processor 120 is by relative for the signal of one of audio signal or vibration signal In another signal delay.Transducer processor 120 by audio signal relative to vibration signal (or Person is contrary) postpone the amount that transducer processor 120 determines the out-phase of signal.In this way, The phase of audio signal and vibration signal removed by transducer processor 120 by introducing time delay Move.Such as, it is provided that the circuit of phaselocked loop can in certain embodiments be used for make audio signal and Vibration signal homophase.Alternatively or additionally, in certain embodiments, transducer processor 120 relative amplitudes determining audio signal and vibration signal.If transducer processor 120 is true It is scheduled between audio signal and the relative amplitude of vibration signal and there are differences, then transducer processor 120 can be in certain embodiments relative to vibration signal attenuated audio signal (or contrary). In some alternatives, processor 104 rather than transducer processor 120 perform signal Process.
Advantageously, some embodiments reduce the mechanical vibration represented in audio signal.Some The layout of embodiment needs the big of the overall size of electronic equipment without damping unit, this damping unit The area of coverage.
Some embodiments of the present invention provide shaking between two films in whole audio band Matched well between dynamic sensitivity, because the sensor that they are same type and identical During manufacture them simultaneously.This means that audio-frequency transducer 116 and vibration transducer 122 have Have and realize the excellent time alignment that accurate noise eliminates.
In certain embodiments, vibration transducer 122 detects the vibration in a dimension, Because the microphone assembly of vibration transducer only can move along an axle.Especially, with shake The direction of vibration is detected on the direction that the plane of the film of dynamic sensor is vertical.In other embodiments In, vibrating sensor 122 includes being arranged to detect vibration in a plurality of directions Multiple vibration transducers 122.In this way, transducer processor 120 can preferably be examined Survey the mechanical vibration type of electronic equipment 100 experience.
In certain embodiments, can be by being sent in vibration transducer to audio-frequency transducer The antiphase vibration signal of capture eliminates by shaking that audio-frequency transducer captures in audio signal Dynamic signal.Mechanical vibration are eliminated from MEMS microphone output, and in microphone package Properly configure ASIC, DSP, ADC.Both first film capture acoustical signal and vibration, and And also capture vibration at the second film.Can exist about the elimination that how can realize vibration signal Various changes.For example, it is possible to realize eliminating vibration signal from audio signal in device software, Even and if MEMS module or other appropriately designed microphone module any can not wrap Include DSP, ADC.Even if it addition, the possible size of equipment is bigger, but other embodiments is permissible Implement ECM mike.
In certain embodiments, one of available microphone module and especially digital microphone Five wiring interfaces can be included.This five wiring interface can include five signals.Can be for sound Frequently transducer 116 distributes one of holding wire.In a similar manner, similarity signal line may be used for shaking Dynamic transducer 122.Owing to being used for such mechanism in some equipment, so so Implementation can be simple and clear and without extensive work, and simple fit can be Possible.
Can implementation system/switch be (between the output from both transducer and ASIC Illustrate) to allow switching to the output of vibration transducer 118 from audio-frequency transducer 116 (or contrary) is so that combination exports or selects the signal from either film.Switching can be by User inputs or automatically performs via circuit (such as ASIC).Such as, if there is no The vibration signal detected or signal level are below threshold value, then system can not combine two Signal is to eliminate vibration signal from the output of the first film.This probability can be considered at place Effective solution in terms of reason ability.
Should be appreciated that term electronic equipment and subscriber equipment are intended to cover any suitable type Wireless user equipment, such as mobile phone, portable data processing equipment or portable web-browsing Device.
It is said that in general, can be in hardware or special circuit, software, logic or it is any Combination is implemented various embodiments of the present invention.For example, it is possible to implement some aspects within hardware, And can by controller, microprocessor or other calculate equipment perform firmware or Software is implemented other side, but the invention is not restricted to this.Although can each by the present invention Plant aspect be shown and described as block diagram, flow chart or use some other figures to represent to illustrate With describe these aspects, it will be readily appreciated, however, that can as non-limiting example hardware, Software, firmware, special circuit or logic, common hardware or controller or other calculating Equipment or its a certain combination are implemented these blocks described herein, device, system, technology or Person's method.
By being performed by the data processor of mobile device (such as in processor entity) Computer software or can be implemented this by hardware or by the combination of software and hardware Inventive embodiment.It addition, in this regard it should be noted that, such as the logic flow in figure Any piece can represent program step or interconnection logic circuit, block and function or program step Combination with logic circuit, block and function.The storage core can implemented in such as processor Sheet or memory block, magnetizing mediums (such as hard disk or floppy disk) and optical medium is (such as DVD and data variant, CD) store software on such physical medium.
Memorizer can be suitable for any type of local technical environment, and can use (such as based on quasiconductor memory devices, magnetic memory set any proper data memory technology Standby and system, optical memory devices and system, read-only storage and removable memorizer) come Implement memorizer.Data processor can be suitable for local technical environment any type and Can include the general purpose computer as non-limiting example, special-purpose computer, microprocessor, Digital signal processor (DSP), special IC (ASIC), gate level circuit are (such as Field programmable gate array-FPGA circuitry) and processor based on polycaryon processor framework in One or more.
Embodiments of the invention can be put into practice in various parts (such as integrated circuit modules). Design and the RF of PWB are mainly designed to highly automated process.Complicated and powerful software Instrument can be used for design is converted into the printed wire being ready to etch on substrate and formed Plate designs.
Program uses the storehouse of the design rule established and the design module prestored on substrate Automatically to conductor wiring and to positioning parts.Once have been completed for substrate or circuit Design, gained design can be sent to make facility or for making with standardized electronic format Make.
As used in this application, term " circuit " refers to all the followings:
A the circuit implementations of () pure hardware is (such as only with analog circuit and/or numeral The implementation of circuit);And
The combination of (b) circuit and software (and/or firmware), such as: (i) processor Combination or (ii) processor/software (including digital signal processor), software and memorizer Part, these parts work together so that device (such as mobile phone or server) is held The various functions of row;And
The part of (c) circuit, such as microprocessor or microprocessor, though software or Firmware is not physically exist, and these circuit need nonetheless remain for this software or firmware for behaviour Make.
This definition of " circuit " is applicable to this term and (includes any right in the application Require) in all uses.As another example, as used in this application, term " electricity Road " also will cover mode implemented as described below, it is (or multiple that this implementation is only a processor Processor) or the part of processor and its (or they) bundled software and/or solid Part." circuit " (if such as and be applicable to specific rights require unit) also will cover base With integrated circuit or for mobile phone application processor integrated circuit or server, Similar integrated circuit in cellular network device or other network equipment.
The present invention is shown by described above offer by exemplary and nonrestrictive example Complete and the irradiative description of example embodiment.But, various amendments and adaptive in view of with Accompanying drawing and claims combine when reading described above can be for related-art technology Personnel become apparent.But, all such with the similar amendment to the teachings of the present invention Will fall in the scope of the present invention as limited in the following claims.
It practice, there is more embodiment, this embodiment includes that previously discussed other is implemented The combination of one or more embodiment in any embodiment in example.

Claims (16)

1. an electronic installation, including:
It is arranged to capture the audio-frequency module of sound, including:
First film, is arranged to detect sound and generate first based on the sound detected Signal;And
Second film, is arranged to detection vibration and generates second based on the vibration detected Signal, described second film than described first film the most insensitive;And
Interface, is arranged to send described first signal and secondary signal, institute to processor State processor and be configured for described secondary signal described first signal of amendment so that from institute State the first signal and remove non-required vibration.
Electronic installation the most according to claim 1, wherein said device includes being configured For revising the modified module of described first signal based on described secondary signal.
Electronic installation the most according to claim 2, wherein said modified module is configured For deducting described secondary signal from described first signal.
Electronic installation the most according to claim 1, wherein said second film is configured to use One in the following or multinomial non-required vibration is included: described device in detection Vibration, wind noise, the manipulation of described device and non-required sound.
Electronic installation the most according to claim 1, wherein said first film and described Two films are adjacent one another are.
Electronic installation the most according to claim 5, including microphone module, Qi Zhongsuo State the first film and described second film is positioned on the substrate of described microphone module.
Electronic installation the most according to claim 1, wherein said second film is following At least one in Xiang: be substantially acoustically isolated to detect the scope of signal;Quilt Acoustical signal is gone quick;In response to one or more frequency range different from described first film, It is tuned to one or more frequency range of non-required vibration.
Electronic installation the most according to claim 7, wherein said signal represents following One of: mechanical vibration and noise.
Electronic installation the most according to claim 7, its middle cover be positioned at described second film it Above and substantially it is being acoustically isolated described second film.
Electronic installation the most according to claim 1, wherein vacuum or partial vacuum It is located therein in the space that the film of described second film moves.
11. electronic installations according to claim 1, wherein said device include for First sound channel sends the first interface of described first signal and for sending out in second sound channel Send the second interface of described secondary signal.
12. electronic installations according to claim 2, wherein said modified module includes It is arranged to the alignment modules of at least one being directed in the following: described first signal With the phase place of described secondary signal, described first signal and the amplitude of described secondary signal.
13. 1 kinds are used for the method processing signal, including:
With the first film detection sound in audio-frequency module;
The first signal is generated based on the sound detected;
With the second film detection vibration in audio-frequency module, described second film exists than described first film The most insensitive;
Secondary signal is generated based on the vibration detected;And
Sending described first signal and described secondary signal to processor, described processor is joined Put for revising described first signal to go from described first signal based on described secondary signal Unless required vibration.
14. methods according to claim 13, wherein said method includes based on described Secondary signal revises described first signal.
15. 1 kinds of equipment being used for processing signal, including:
For the device with the first film detection sound in audio-frequency module;
For generating the device of the first signal based on the sound detected;
For the device with the second film detection vibration in audio-frequency module, described second film compares institute State the first film the most insensitive;
For generating the device of secondary signal based on the vibration detected;And
For sending described first signal and the device of described secondary signal to processor, described Processor is configured for described secondary signal and revises described first signal so that from described First signal removes non-required vibration.
16. equipment according to claim 15, including for based on described secondary signal Revise the device of described first signal.
CN201080069488.3A 2010-08-27 2010-08-27 For removing microphone apparatus and the method for non-required sound Active CN103155032B (en)

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KR20130047763A (en) 2013-05-08
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US20130208923A1 (en) 2013-08-15
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US9549252B2 (en) 2017-01-17

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